A263781 Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and exactly two more elements moved upwards than downwards

0, 0, 0, 0, 0, 1, 3, 11, 31, 93, 248, 670, 1724, 4434, 11120, 27772, 68402, 167695, 407659, 986955, 2376323, 5702352, 13631753, 32500113, 77272919, 183336571, 434092838, 1026096990, 2421667040, 5707720617, 13436324063, 31596325769

Offset

1,7

Comments

Column 2 of A263787

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

All solutions for n=7
..2....0....2
..0....3....0
..1....1....1
..5....2....3
..3....6....6
..4....4....4
..6....5....5

Crossrefs

Cf. A263787

Sequence in context: A108898 A291887 A217323 * A119901 A106934 A146581

Adjacent sequences: A263778 A263779 A263780 * A263782 A263783 A263784

Keyword

nonn

Author

R. H. Hardin, Oct 26 2015

Status

approved